摘要:
A corner reflector 11 includes: a radio wave reflection film 11a having three reflection faces that are mutually orthogonal, and an unfolding device 11b which unfolds the radio wave reflection film 11a three-dimensionally. The corner reflector further includes: a canopy 12 that unfolds concurrently with unfolding of the radio wave reflection film 11a, and the canopy 12 is connected to the unfolding device 11b so as to partially overlie the radio wave reflection film 11a.
摘要:
A fuel supply device according to the present invention comprises a first fuel pump (21) for forcing fuel from a fuel tank (11) to a fuel passage (14), a first electric motor (23) for driving the first fuel pump (21), a second fuel pump (22) for forcing fuel from the fuel tank (11) to the fuel passage (14), a second electric motor (24) for driving the second fuel pump (22), a supply flow rate sensor (26) for detecting flow rate in the supply passage (14), and a control device (25) for controlling the flow rate in the supply passage (14) to follow a desired value thereof, by regulating rotational speeds of the first and second electric motors (23, 24) depending on a difference between the desired value and a detected value of flow rate in the supply passage (14).
摘要:
An electricity generation device includes a permanent-magnet electric generator with three or more phase windings each having one end serving as an output terminal and the other end connected to a neutral point, bidirectional semiconductor switching circuits connected between the respective phase windings and the neutral point and capable of interrupting connections between the respective phase windings and the neutral point, each bidirectional semiconductor switching circuit allowing current to flow therethrough in both directions in a conduction state and, after being input with a gate signal, retaining the conduction state by itself until the current stops flowing therethrough, a self-excited gate signal generation circuit for generating a gate signal for each of the bidirectional semiconductor switching circuits from AC voltages excited in the phase windings associated with others of the bidirectional semiconductor switching circuits such that the gate signal is output to one of the bidirectional semiconductor switching circuits during a period including the time at which the AC voltage excited in the corresponding phase winding turns from positive to negative and during a period including the time at which the AC voltage excited in the corresponding phase winding turns from negative to positive, and a startup gate signal output circuit for outputting a startup gate signal to all of the bidirectional semiconductor switching circuits when the permanent-magnet electric generator is to be started.
摘要:
There is disclosed a gradient structure material comprising a substrate 1 and a functional material 2 formed on the substrate. The gradient structure material is thermally treated while a desired gradient temperature is applied to a specific direction and a specific region of the functional material on the substrate. Consequently, without adding "gradient structure" of a component concentration, a content of oxide, or a crystal structure, the functional material on the substrate is provided with useful function which is not heretofore existed, or a performance can be enhanced unlike a conventional technique.
摘要:
An FRP continuous molding apparatus (10) continuously molds an FRP from a layered sheet that includes prepreg sheets layered over each other. The prepreg sheets each include thermoplastic resin and reinforcement fibers, and differ from each other in fiber orientation. The FRP continuous molding apparatus (10) includes: sheet feeding devices (3a, 3b, 3c) continuously feeding the layered sheets (1a, 1b, 1c) in a feeding direction; a layering device layering, over each other, the layered sheets fed from the sheet feeding devices, and thereby forming a sheet layered body (14); and a shaping mechanism (7) molding the sheet layered body into an FRP (2) while the sheet layered body is being transferred in the feeding direction. The FRP has a cross section that is a target shape. The sheet layered body includes the reinforcement fibers whose fiber orientation is the feeding direction.